Add stream support class for QIODevice to boost::iostreams::stream

scwx-qt/scwx-qt.cmake

@@ -106,7 +106,8 @@ set(SRC_UI source/scwx/qt/ui/flow_layout.cpp
            source/scwx/qt/ui/level3_products_widget.cpp)
 set(HDR_UTIL source/scwx/qt/util/font.hpp
              source/scwx/qt/util/font_buffer.hpp
-             source/scwx/qt/util/json.hpp)
+             source/scwx/qt/util/json.hpp
+             source/scwx/qt/util/streams.hpp)
 set(SRC_UTIL source/scwx/qt/util/font.cpp
              source/scwx/qt/util/font_buffer.cpp
              source/scwx/qt/util/json.cpp)

scwx-qt/source/scwx/qt/util/streams.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <boost/iostreams/categories.hpp>
+#include <QIODevice>
+
+namespace scwx
+{
+namespace qt
+{
+namespace util
+{
+
+class IoDeviceSource
+{
+public:
+   typedef char                         char_type;
+   typedef boost::iostreams::source_tag category;
+
+   IoDeviceSource(QIODevice& source) : source_ {source} {}
+   ~IoDeviceSource() {}
+
+   std::streamsize read(char* buffer, std::streamsize n)
+   {
+      return source_.read(buffer, n);
+   }
+
+private:
+   QIODevice& source_;
+};
+
+} // namespace util
+} // namespace qt
+} // namespace scwx